Class: WeatherJp::Adapter

Inherits:
Object
  • Object
show all
Defined in:
lib/weather_jp/adapter.rb

Defined Under Namespace

Modules: Reader

Constant Summary collapse

BASE_URL = 
'http://weather.service.msn.com/'
ACTION = 
'data.aspx'
LANG = 
'ja-JP'
SCALE = 
'C'

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(city_name) ⇒ Adapter

Returns a new instance of Adapter.



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# File 'lib/weather_jp/adapter.rb', line 21

def initialize(city_name)
  @name = city_name
end

Instance Attribute Details

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/weather_jp/adapter.rb', line 19

def name
  @name
end

Class Method Details

.get(city_name) ⇒ WeatherJp::Weather?

Returns nil when not found weather forecasts.

Parameters:

  • city_name (String)

Returns:



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# File 'lib/weather_jp/adapter.rb', line 9

def get(city_name)
  new(city_name).get
end

Instance Method Details

#build_weather(attrs, day_weathers) ⇒ Object 



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# File 'lib/weather_jp/adapter.rb', line 29

def build_weather(attrs, day_weathers)
end

#city ⇒ Object

Ruby 2.0.0 version has no ‘Nokogiri::XML::Element#to_h`.



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# File 'lib/weather_jp/adapter.rb', line 48

def city
  @city ||= begin
    attrs = Hash[weather_node.attributes.map {|k, v| [k, v.value]}]
    City.new(attrs['weathercityname'], attrs)
  end
end

#day_weather_nodes ⇒ Object 



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# File 'lib/weather_jp/adapter.rb', line 43

def day_weather_nodes
  xml.xpath('/weatherdata/weather/*[attribute::skytextday or attribute::skytext]')
end

#day_weathers ⇒ Object 



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# File 'lib/weather_jp/adapter.rb', line 36

def day_weathers
  day_weather_nodes.each_with_index.map do |n, i|
    attrs = Hash[n.attributes.map {|k, v| [k, v.value] }]
    DayWeather.new(attrs, city, i - 1)
  end
end

#get ⇒ Object 



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# File 'lib/weather_jp/adapter.rb', line 25

def get
  weather_node ? weather : nil
end

#params ⇒ Object 



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# File 'lib/weather_jp/adapter.rb', line 71

def params
  {
    weadegreetype: SCALE,
    culture: LANG,
    weasearchstr: name,
  }
end

#url ⇒ Object 



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# File 'lib/weather_jp/adapter.rb', line 67

def url
  "#{BASE_URL}#{ACTION}?#{Rack::Utils.build_query(params)}"
end

#weather ⇒ Object 



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# File 'lib/weather_jp/adapter.rb', line 32

def weather
  Weather.new(city, day_weathers)
end

#weather_node ⇒ Object 



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# File 'lib/weather_jp/adapter.rb', line 55

def weather_node
   @weather_node ||= xml.xpath('/weatherdata/weather').first
end

#xml ⇒ Object 



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# File 'lib/weather_jp/adapter.rb', line 59

def xml
  @xml ||= Nokogiri::XML.parse(xml_str)
end

#xml_str ⇒ Object 



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# File 'lib/weather_jp/adapter.rb', line 63

def xml_str
  @xml_str ||= Reader.read(url)
end